/* 用于登录页  */
html,body{
	height:100%;
	margin:0;
	padding:0;
	overflow:hidden;
}

body{
	background:#6FB2E6;
}

#div_center{
	width:478px;
	height:287px;
	background:#6FB2E6 url(../images/bg_login.jpg) no-repeat;
	position:relative;
	left:50%;
	top:50%;
	margin-left:-238px;
	margin-top:-143px;
}

#div_inputbox{
	width:170px;
	height:73px;
	position:absolute;   /*这里用reletive 也可以 */
	top: 175px;
	left:210px;
}

#adminName ,#password {
	background:url(../images/bg_login_inputbox.jpg) no-repeat;
	border:none;
	width:168px;
	height:20px;
}
#password{
	margin-top:16px;
}

#btn_img{      /*按钮就是用的直接绝对定位*/
	position:absolute;
	top: 175px;
	left:390px;
}